You won't find anything under 300 with Dusk/Dawn automation. If you want to spend less skip that as contrary to popular belief it's not needed.
We've been reefing for years on good old timers, for about 185 you can get a 24" 300w LED fixture with 38" of coverage for SPS or 48" of coverage for LPS & Zoas, or both just keep SPS toward the middle.
http://www.ebay.com/itm/MarsAqua-Di...493?pt=LH_DefaultDomain_0&hash=item5b029756ad
That's twice the coverage of an Ocean Revive and 20 bucks cheaper without the timer though, you can get timers at home depot for practically nothing (get 2 timers one for whites and one for blues) and you'll get the exact same features of a T247.